A refrigerant pipe fitting according to an embodiment of the present invention is a fitting in the shape of a hollow pipe for connecting pipes, the fitting comprising: an outer pipe opening which is opened at one end of the fitting and allows an outer pipe to be inserted therein; an inner pipe opening which is opened at the other end of the fitting and allows an inner pipe to be inserted therein by being inserted into the outer pipe from the inside of the fitting; a pressing part which forms a part of the inner surface of the fitting and has an inside diameter that becomes narrower as the pressing part extends toward the inner pipe opening, such that as the fitting moves, the pressing part press-deforms the outer pipe, thereby connecting to the inner pipe; and a connecting part which is formed on the inner surface of the fitting between the pressing part and the outer pipe opening and restricts an end part of the outer pipe to prevent the fitting from departing therefrom.